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Search: id:A072429
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| A072429 |
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Numbers n for which there are exactly five k such that n = k + reverse(k). |
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+0
1
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| 55, 154, 505, 525, 545, 565, 585, 605, 625, 645, 665, 685, 1414, 1434, 1441, 1454, 1474, 1494, 1514, 1534, 1554, 1574, 1594, 2541, 5005, 6985, 14014, 14041, 14241, 14441, 14641, 14841, 15041, 15241, 15441, 15641, 15841, 15994, 18458, 19558
(list; graph; listen)
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OFFSET
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0,1
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COMMENT
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Subsequence of A067030. First term is A072041(5).
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LINKS
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Index entries for sequences related to Reverse and Add!
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EXAMPLE
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55 = k + reverse(k) for k = 14, 23, 32, 41, 50; 1441 = k + reverse(k) for k = 1040, 1130, 1220, 1310, 1400.
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PROGRAM
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(ARIBAS) var n, k, c, i, rev: integer; st, nst: string; end; m := 5; for n := 0 to 24600 do k := n div 2; c := 0; while k <= n and c < m + 1 do st := itoa(k); nst := ""; for i := 0 to length(st) - 1 do nst := concat(st[i], nst); end; rev := atoi(nst); if n = k + rev then inc(c); if k mod 10 <> 0 and k <> rev then inc(c); end; end; inc(k); end; if c = m then write(n, ", "); end; end;
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CROSSREFS
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Cf. A067030, A072041.
Sequence in context: A130745 A096664 A067978 this_sequence A046438 A043510 A044387
Adjacent sequences: A072426 A072427 A072428 this_sequence A072430 A072431 A072432
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KEYWORD
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base,nonn
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AUTHOR
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Klaus Brockhaus (klaus-brockhaus(AT)t-online.de), Jun 17 2002
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